Liquid treatment device



June 30, 1953 l E, mcg 2,643,771

LIQUID TREATMENT DEvTcE Filed Feb. 1e, 195o age, occupies a minimum of space. The manner in which this object is achieved is Patented June 30, 419453 Permutit Company, New

ration of Delaware York ,vN; Y., a corpov Application February 18, 195o, sr'ii No.1215.069 v This invention relatesl to a liquid treatment" device and it comprises a collapsible bag having sides made of pliable plastic material, means for closing the top of said bag, and a rigid bottom element having mounted thereon ltering means and outlet valve means; all as more fullyV scribed and as claimed hereinafter. Y

'I'he problem of providing shipwreck victims with drinking water has been in existence ever since man went to sea. The increased transoceanic movement of airplanes has made this problem more acute and there have,.in recent years, been developed new chemical processes of rendering sea water potable by removing the dis-w solved salts by means ofion exchange and/or precipitation.

.i The object of this invention is to provide for the carrying out of such processes a device which is compact, reliable, light in weight, efficient and convenient in manipulation and. which, in storshown in the appended drawing in which:

Fig. 1 is an elevational view of a device according to my invention, with the lter element 40 and the lower part of the tube II removed to show the bottom element 30;

Fig. 2 is a side view of the same device as it appears during use;

Fig. 3 is a view of the upper portion of the side opposite to that shown in Fig. 1;

Fig. 4 is a cross-sectional view on an enlarged scale of the lower portion of the device taken along 4-4 of Fig. 1;

Fig. 5 is a cross-sectional view, likewise on an enlarged scale, taken along line 5-5 of Fig. l;

and

Fig. 6 is a side View of the device rolled up for storage.

Like numerals refer to like parts throughout the several views.

As shown in the drawing, thedevice comprises a container I0 which is formed by a tube I I having an open tcp and made of pliable plastic material such as the vinyl resin known under the trade name Vinylite A thickness of about 0,01 to 0.02 inch is satisfactory but not critical. Joints of such material may readily be made by heating with simultaneous application o-f pressure to the parts to be joined. The previous application of a suitable solvent sometimes impro-ves the quality of the joints.

Adjacent to the open top a stiff strip I2 0f plastic material is joined to one side of thetube I I and a pliable reinforcement strip I 3 to the other dei side,` ther end portions o1' truding somewhat beyond) the flattened tube'lI and beingjoined to each other at I4 and I5'. At some distance below'stripy I3 a male part 2U of a.

snap fastener is mounted on` ak pliable` support* 2 I Ithe lower, wider portion22`4 of which is joinedv to a ystiff plate123'which'in'turn-is'joined to the" tube II andnpart of which lies back of the malefl part 20. Qnthe-'oppositesjide of thetube I I joined thereto the portion^26 of'a pliable strap 24 on which is mounted the'femal'e part 25 ofga snap fastenenv Between :portion 216' and thetubevl I I is sealeda supporting tape 21, made Vof cotton or a plastic material `'such ashthat known under the trade name Nylon/f which serves to fastenf the device to someobj'ect so as to prevent loss.

They lower end of the'fc'ontainer I0V is closed by a rigid bottom element v3l) having a flange 3ll to which, at 32, is joined the lowermost vpart ofthe tubefII., Thebottonr el ement*30 vcomprises aV frame 33 'pro-jectin`g upwardly intdthe tube II*A and having two 'ribs sa" which divide the space within the frame 33 into three 'ch'ambers" 35536' and 31, open on opposite sides. 'Ihe ri'bs 34 are provided with notches 38 forming passageways to establish communication between adjacent pairs of chambers. On each side the frame 33 carries a filter element 40 made of cotton lter cloth or some other suitable material such as woven glass or synthetic plastic, fine mesh wire screening or a finely perforated sheet of soft rubber. Rims 4I made of plastic material are sealed to the periphery of each lter element 40 and, through the interstices of the filter element. to the frame 33, thus effectively preventing unravelling of the edges of the filter elements 'if they are made of a woven material, and holding them in place over both sides of the open chambers 35, 36 and 31, the ribs 34 supporting the central portions of the filter elements 40.

In the bottom element 3,0 and-.connecting the chamber 31 with the outside is an outlet passage 45 into which -is pressed ahollow valve body 46 having a port 41 formed ina flange 48 and providedvwith an internally threaded portion 49. Within the valve body 46 is a moveable valve member 50 having a flange 5I adapted to engage and close the port 41. The valve member 50 has an externally threaded portion 52 matching the threaded portion 49, and a vknurled flange 53. Within the member 50 is a central bore 54 communicating with two cross-bores 55.

The plastic parts of the device which are same type of plastic material in order to provide strips lz and lepre-' strong and permanent joints. Instead of the vinyl resin referred to previously, other suitable water-proof and water-tight plastic materials may be employed such as rubber or impregnated fabric. Transparency or translucency of the tubular portion (a property of Vinyl resins), While advantageous in some types of use, is not essential.

In using the device, the member 50 is screwed in so that ilange 5I closes port 41. Then pressure is exerted against the ends I4 and I5, as by grasping between thumb and index linger of one hand, soy that the stiff strip I2 bends and the middle portion of the pliable reinforcement kstrip I3 may be pulled away from strip I2 leaving a relatively wide opening through which suitable than those mentioned herein may be made without departing from the spirit of .this invention and reference is, therefore, made to the follow- Y ing claims Vfor a denition of the scope of my quantities of sea water 60 and treating chemical are introduced.

The open top of the container is then closed by tightly rolling or folding the upper portion of tube II-over the strip I3 towards the male part 20 whereupon the female part 25 is snappedY to the male part 2B so as to strap the rolled-down folds of the tube II rmly against the stiff plate 22,vas'shown in Fig. 2. In this manner an effectivelyV water-tight closure of the open top is obtained even when subjecting the not-folded part ofthe ltube Il to external Vpressure or handling. This-container closure forms the subject matter of my Patent No. 2,372,391,dated March 27, 1945.

The container I isthen kneaded, shaken or otherwise manipulated to bring about good contact between the liquid and the treating material. After an interval of time the chemical reactions in the bag arecompleted.V Upon unscrewing the moveable Valve member 50 a few turns and using the knurled flange 53 as a mouthpiece, clear-treated Water may be sucked from the bore 54,-the lter elements 40 retaining the suspended matter 6I (see Fig` 4). When the user has drunk all the Water the bag is opened by pulling the female part 25 away from the male part 20 and unfolding the upper end of tube II. The solid invention.

What I claim'is: A liquid treatment device comprising a collapsible bag having sides 'made of a tube of pliable plastic material and a bottom element made of rigid plastic material joined to the bottom end of,` said tube,- a rectangular frame integrally formed onsaid bottom element and having two.

opposite open sides extending intosaid tube, lter means wholly within said bag and mounted' on said frame and extending over said open sides, an outlet passage in said bottom element communicating with the space within said frame, valve means in said outlet passage, and means for closing the top end of said tube.

l ERIC PICK.

References Cited in the file of this patent UNITED STATES PATENTS y Date France Nov. 16, .1915 

